DTC P0037: Right Rear Ho2S Heater Circuit Low: Condition

PCM monitors control signal at terminal No. 95. If PCM turns off HO2S heater (does not ground circuit) and voltage remains low, DTC is set. Causes may include the following:

• Faulty right rear HO2S.
• Open in Black/White wire between main relay harness connector terminal "D" and HO2S harness connector terminal "C".
• Open or short to ground in Light Green/Black wire between HO2S harness connector terminal "D" and PCM harness connector terminal No. 95. See Figure .
• Poor connection(s) at right rear HO2S harness connector or PCM harness connector.
• PCM malfunction.